Example of printer friendly css

example.css

body {
  margin: 0;
  width:29.7cm;
  height: 21cm;
  overflow-x: hidden;
  overflow: hidden;
  font-size: 0.31cm;
}

h2{
    font-size: 0.45cm;
    margin-block-start: 0.1cm;
    margin-block-end: 0.1cm;
}

h3{
    font-size: 0.37cm;
    margin-block-start: 0.13cm;
    margin-block-end: 0.13cm;
}

h4{
    font-size: 0.33cm;
    margin-block-start: 0.16cm;
    margin-block-end: 0.16cm;
}

.small-text{
    font-size: 0.32cm;
}

.r-small-text{
    font-size: 0.29cm;
}

*{
    border-spacing: 0.1cm;
}

.light{
  background: white;

}

.dark{
  background: #bcbfc4;
}

#listing{
  width:100%;
  margin-top:0cm;
  background:red;
  float: top;
  display:inline;
}

#listing table{
    margin-top: 1cm;
    page-break-inside: avoid;
    page-break-after: always;
}

.item{
  position:relative;
  width:100%;
  height:10cm;
  box-sizing: border-box;
  /* display: inline-block; */
}
.longreceipt .item{
    height: 20cm;
}

.item-border{
	border: 1px dotted rgba(125,125,125, 0.3);
}

#items{
  height:100%;
  margin-top:0px;
}

.close{
  display:inline;
}

.footer{
  position: absolute;
  text-align: center;
  bottom:0;
  width:100%;

}

.page{
    position: relative;
    height: 10cm;
}

.halfpage{
    height: 10cm !important;
}

.longpage{
    height: 20cm !important;
}

@media print and (width: 29.7cm) and (height: 21cm) {
    @page {
        size: landscape;
        margin: 0;
    }

}

@page{
    margin-left: 0px;
    margin-right: 0px;
    margin-top: 0px;
    margin-bottom: 0px;
}

@media print{
   .noprint{
       display:none;
   }
}

#noprint{
    position: absolute;
    left: 45%;
    top:45%;
    width:450px;
    height:175px;
}

#noprintbody{
    font-size: 16px;
    opacity:0.45;
    position: relative;
    left: -50%;
    top:-70%;
    border: dotted black 1px;
    border-radius:5px;
    background:white

}

#noprintbody:hover{
    opacity:1;
}

.tabletop{
    border: 1px solid black;
}

tr.border_bottom th {
  border-bottom:1pt solid black;
}

tr.border_top th {
  border-top:1pt solid black;
}

.itemtable{
    margin: 0.25cm;
    width: 29.2cm;
    height: 20.5cm;
    border-collapse: separate;
    border-spacing: 0.25cm;
    page-break-inside: avoid;
}
.itemtabletd{
    height: 9cm;
    width: 6.925cm;

}

.longreceipt{
	height: 20.0cm !important;
}


.nobold{
    font-weight: normal;
}

.cover{
    top:0px;
    left:0px;
    width:100%;
    height:100%;
    position:absolute;
    background:rgba(255,255,255,1);
    z-index: 10;
}

.cover-img{
    margin-top: 100px;
}

.container{
    width: 2cm;
    height: 2cm;
    text-align: center;
    line-height: 2cm;
}

.reference{
    width: 1cm;
    height: 1cm;
    opacity: 1;
}

.qr{
    width: 2.5cm;
    height: 2.5cm;
    text-align: center;
}

.ordertable{
    width: 100%;
    text-align: center;
}

.content_msg{
    font-size: 55px;
    display:inline;
}

.content_msg_2{
    font-size: 35px;
    display:inline;
}

.fee-view{
    font-size: 0.30cm;
}

.printhelper{
    position: fixed;

    top: 100px;
    margin-left:10px;
    background:red;

    width: calc( 50% - 530px );

    border: 1px solid black;

}